Common name for small PASSERIFORMES in the family Fringillidae. They have a short stout bill (BEAK) adapted for crushing SEEDS. Some species of Old World finches are called CANARIES.

Sounds used in animal communication.

PASSERIFORMES of the suborder, Oscines, in which the flexor tendons of the toes are separate, and the lower syrinx has 4 to 9 pairs of tensor muscles inserted at both ends of the tracheal half rings. They include many commonly recognized birds such as CROWS; FINCHES; robins; SPARROWS; and SWALLOWS.

In some animals, the jaws together with their horny covering. The beak usually refers to the bill of birds in which the whole varies greatly in form according of the food and habits of the bird. While the beak refers most commonly to birds, the anatomical counterpart is found also in the turtle, squid, and octopus. (From Webster, 3d ed & Storer, et al., General Zoology, 6th ed, p491, 755)

Nucleus in the NEOSTRIATUM of bird brains that sends signals for song production and receives auditory input. In some adult SONGBIRDS, research has shown that the size of this nucleus changes seasonally and that it exhibits neurogenesis.

I'm sorry for any confusion, but "Ecuador" is a country in South America and not a medical term. The term you might be looking for is "ecdysone," which is a hormone found in arthropods that controls their molting process.

Warm-blooded VERTEBRATES possessing FEATHERS and belonging to the class Aves.

Modulation of human voice to produce sounds augmented by musical tonality and rhythm.

A species of gram-negative bacteria causing chronic respiratory disease in POULTRY.

Diseases of birds not considered poultry, therefore usually found in zoos, parks, and the wild. The concept is differentiated from POULTRY DISEASES which is for birds raised as a source of meat or eggs for human consumption, and usually found in barnyards, hatcheries, etc.

A genus, commonly called budgerigars, in the family PSITTACIDAE. In the United States they are considered one of the five species of PARAKEETS.

A widely distributed order of perching BIRDS, including more than half of all bird species.

The anterior of the three primitive cerebral vesicles of the embryonic brain arising from the NEURAL TUBE. It subdivides to form DIENCEPHALON and TELENCEPHALON. (Stedmans Medical Dictionary, 27th ed)

A selective aromatase inhibitor effective in the treatment of estrogen-dependent disease including breast cancer.

Relatively permanent change in behavior that is the result of past experience or practice. The concept includes the acquisition of knowledge.

The graphic registration of the frequency and intensity of sounds, such as speech, infant crying, and animal vocalizations.

Sexual activities of animals.

Animal behavior associated with the nest; includes construction, effects of size and material; behavior of the adult during the nesting period and the effect of the nest on the behavior of the young.

Any of several Old World finches of the genus Serinus.

The anterior subdivision of the embryonic PROSENCEPHALON or the corresponding part of the adult prosencephalon that includes the cerebrum and associated structures.

NEURAL PATHWAYS and connections within the CENTRAL NERVOUS SYSTEM, beginning at the hair cells of the ORGAN OF CORTI, continuing along the eighth cranial nerve, and terminating at the AUDITORY CORTEX.

The number of offspring produced at one birth by an oviparous or ovoviviparous animal.

An order of BIRDS comprised of PIGEONS; DOVES; and an extinct family that includes dodos.

Use of sound to elicit a response in the nervous system.

Those characteristics that distinguish one SEX from the other. The primary sex characteristics are the OVARIES and TESTES and their related hormones. Secondary sex characteristics are those which are masculine or feminine but not directly related to reproduction.